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Activated Porous Carbon Spheres with Customized Mesopores through Assembly of Diblock Copolymers for Electrochemical Capacitor

Journal Article


Abstract


  • A series of porous carbon spheres with precisely adjustable mesopores (4-16 nm), high specific surface area (SSA, ¿2000 m2 g-1), and submicrometer particle size (¿300 nm) was synthesized through a facile coassembly of diblock polymer micelles with a nontoxic dopamine source and a common postactivation process. The mesopore size can be controlled by the diblock polymer, polystyrene-block-poly(ethylene oxide) (PS-b-PEO) templates, and has an almost linear dependence on the square root of the degree of polymerization of the PS blocks. These advantageous structural properties make the product a promising electrode material for electrochemical capacitors. The electrochemical capacitive performance was studied carefully by using symmetrical cells in a typical organic electrolyte of 1 M tetraethylammonium tetrafluoroborate/acetonitrile (TEA BF4/AN) or in an ionic liquid electrolyte of 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4), displaying a high specific capacitance of 111 and 170 F g-1 at 1 A g-1, respectively. The impacts of pore size distribution on the capacitance performance were thoroughly investigated. It was revealed that large mesopores and a relatively low ratio of micropores are ideal for realizing high SSA-normalized capacitance. These results provide us with a simple and reliable way to screen future porous carbon materials for electrochemical capacitors and encourage researchers to design porous carbon with high specific surface area, large mesopores, and a moderate proportion of micropores.

UOW Authors


  •   Tang, Jing (external author)
  •   Wang, Jie (external author)
  •   Shrestha, Lok Kumar. (external author)
  •   Hossain, Md Shahriar
  •   Alothman, Zeid Abdullah. (external author)
  •   Yamauchi, Yusuke (external author)
  •   Ariga, Katsuhiko (external author)

Publication Date


  • 2017

Citation


  • Tang, J., Wang, J., Shrestha, L. Kumar., Hossain, M. A., Alothman, Z. Abdullah., Yamauchi, Y. & Ariga, K. (2017). Activated Porous Carbon Spheres with Customized Mesopores through Assembly of Diblock Copolymers for Electrochemical Capacitor. ACS Applied Materials and Interfaces, 9 (22), 18986-18993.

Scopus Eid


  • 2-s2.0-85020267476

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2572

Number Of Pages


  • 7

Start Page


  • 18986

End Page


  • 18993

Volume


  • 9

Issue


  • 22

Place Of Publication


  • United States

Abstract


  • A series of porous carbon spheres with precisely adjustable mesopores (4-16 nm), high specific surface area (SSA, ¿2000 m2 g-1), and submicrometer particle size (¿300 nm) was synthesized through a facile coassembly of diblock polymer micelles with a nontoxic dopamine source and a common postactivation process. The mesopore size can be controlled by the diblock polymer, polystyrene-block-poly(ethylene oxide) (PS-b-PEO) templates, and has an almost linear dependence on the square root of the degree of polymerization of the PS blocks. These advantageous structural properties make the product a promising electrode material for electrochemical capacitors. The electrochemical capacitive performance was studied carefully by using symmetrical cells in a typical organic electrolyte of 1 M tetraethylammonium tetrafluoroborate/acetonitrile (TEA BF4/AN) or in an ionic liquid electrolyte of 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4), displaying a high specific capacitance of 111 and 170 F g-1 at 1 A g-1, respectively. The impacts of pore size distribution on the capacitance performance were thoroughly investigated. It was revealed that large mesopores and a relatively low ratio of micropores are ideal for realizing high SSA-normalized capacitance. These results provide us with a simple and reliable way to screen future porous carbon materials for electrochemical capacitors and encourage researchers to design porous carbon with high specific surface area, large mesopores, and a moderate proportion of micropores.

UOW Authors


  •   Tang, Jing (external author)
  •   Wang, Jie (external author)
  •   Shrestha, Lok Kumar. (external author)
  •   Hossain, Md Shahriar
  •   Alothman, Zeid Abdullah. (external author)
  •   Yamauchi, Yusuke (external author)
  •   Ariga, Katsuhiko (external author)

Publication Date


  • 2017

Citation


  • Tang, J., Wang, J., Shrestha, L. Kumar., Hossain, M. A., Alothman, Z. Abdullah., Yamauchi, Y. & Ariga, K. (2017). Activated Porous Carbon Spheres with Customized Mesopores through Assembly of Diblock Copolymers for Electrochemical Capacitor. ACS Applied Materials and Interfaces, 9 (22), 18986-18993.

Scopus Eid


  • 2-s2.0-85020267476

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2572

Number Of Pages


  • 7

Start Page


  • 18986

End Page


  • 18993

Volume


  • 9

Issue


  • 22

Place Of Publication


  • United States